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-LAT realtime follow-ups of high-energy neutrino alerts
S. Garrappa, S. Buson, A. Franckowiak +3
The detection of the flaring gamma-ray blazar TXS 0506+056 in spatial and temporal coincidence with the high-energy neutrino IC-170922A represents a milestone for multi-messenger a…
Daily variability at milli-arcsecond scales in the radio quiet NLSy1 Mrk 110
Francesca Panessa, Miguel Perez-Torres, Lorena Hernandez-Garcia +14
The origin of radio emission in the majority of Active Galactic Nuclei (AGN) is still poorly understood. Various competing mechanisms are likely involved in the production of radio…
Candidate Tidal Disruption Event AT2019fdr Coincident with a High-Energy Neutrino
Simeon Reusch, Robert Stein, Marek Kowalski +46
The origins of the high-energy cosmic neutrino flux remain largely unknown. Recently, one high-energy neutrino was associated with a tidal disruption event (TDE). Here we present A…
RadioAstron discovery of a mini-cocoon around the restarted parsec-scale jet in 3C 84
T. Savolainen, G. Giovannini, Y. Y. Kovalev +19
We present RadioAstron space-based very long baseline interferometry (VLBI) observations of the nearby radio galaxy 3C84 (NGC1275) at the centre of the Perseus cluster. The observa…
Morphological transition of the compact radio lobe in 3C84 via the strong jet-cloud collision
Motoki Kino, Kotaro Niinuma, Nozomu Kawakatu +8
We report multi-epoch Very Long Baseline Interferometric (VLBI) observations of the compact radio lobe in the radio galaxy 3C84 (NGC1275) during 2016 - 2020. The image sequence of…
Jetted radio-quiet quasars at z>5
Tullia Sbarrato, Gabriele Ghisellini, Gabriele Giovannini +1
We report on the JVLA observations of three high redshift Active Galactic Nuclei (AGN), having a black hole mass estimated to be among the largest known. Two of them, SDSS J0100+28…